If you're integrating WeChat Pay's recurring billing or pay-after-use features, this handles the full flow: pure contract signing, in-payment signing, deduction requests, pre-deduction notifications, cancellations, refunds, and reconciliation. It covers both merchant and service provider modes, walks you through product selection (subscription vs. deferred payment), and provides official request/response samples for every API. Note that WeChat only publishes client-side code examples (iOS, Android, Mini Program), no official server-side code in any language, so if you need Java or Go implementations you'll get AI-generated reference code with appropriate disclaimers. The quality checklist is thorough, covering signature handling across both V2 and V3 protocols, callback idempotency, and the specific gotchas around 24-hour delayed charges.
npx skills add https://github.com/wechatpay-apiv3/wechatpay-skills --skill wechatpay-deduction-service